Interaction of NpO2+ with Cl– in NaCaCl-type solutions at ionic strength of 6M: Effect of presence of Ca ion on interaction


Interaction of NpO2+ with Cl– in NaCaCl-type solutions at ionic strength of 6M: Effect of presence of Ca ion on interaction

Nagasakia, S.; Saito, T.; Tsushima, S.; Goguen, J.; Yang, T.

The interaction of NpO2+ with Cl– was studied using visible–near-infrared spectroscopy in NaClCaCl2NaClO4, NaClNaClO4, and CaCl2NaClO4 solutions with ionic strength (I) of 6M. The spectra of NpO2+ around 980 nm varied with Cl– concentration in the NaClCaCl2NaClO4 and NaClNaClO4 solutions at [Cl–] ≥ 3.5M, but not in the CaCl2NaClO4 solution. Assuming the 1:1 interaction between NpO2+ and Cl–, the apparent equilibrium constants at I = 6M were evaluated. The presence of Ca2+ was found to destabilize overall interaction between NpO2+ and Cl–. The observations were consistent with the density functional theory calculation.

Keywords: Cl–; Density Functional Theory Calculation; Equilibrium Constants; Ionic Strength; NpO2+; Presence of Ca2+

  • Open Access Logo Contribution to proceedings
    37th Annual Conference of the Canadian Nuclear Society and 41st Annual CNS/CNA Student Conference, 04.-07.06.2017, Niagara Falls, Canada
    DOI: 10.1016/j.net.2017.08.010

Permalink: https://www.hzdr.de/publications/Publ-26142
Publ.-Id: 26142